Interactive
University of Cambridge

University of Cambridge: Nrich: Game Khun Phaen Escapes to Freedom

For Students Pre-K - 1st
This interactive game is based on a famous character in a Thai legend. See if you can figure out how he escaped! You will have to use your problem solving and spatial relationship skills to figure out this one.
Activity
University of Cambridge

University of Cambridge: Nrich: Magic Triangle

For Students 3rd - 8th
Use your problems solving skills to make everything add up correctly for this challenge. The solution is right at this one page website.
Activity
University of Cambridge

University of Cambridge: Nrich: Butterfly Flowers

For Students K - 1st
This one page website offers a challenge that will require you to use your problem solving skills. There are teacher tips and the solution available to help.
Activity
University of Cambridge

University of Cambridge: Nrich: Magic Circles

For Students 3rd - 8th Standards
Use your problem solving skills to figure out this challenge. A number of solutions are available right at this one page website.
Interactive
University of Cambridge

University of Cambridge: Nrich: Game Pumpkin Patch

For Students Pre-K - 1st
Sharpen your problem solving and strategy skills playing this Somali game, Pumpkin Patch. The rules are simple but the game requires some thinking. There is a "Get Printable Page," link at the top to print out the materials you need.
Lesson Plan
Science and Mathematics Initiative for Learning Enhancement (SMILE)

Smile: Lesson: An Introduction to Estimation and Measurements

For Teachers 3rd - 5th
Pancakes anyone? Young scholars explore estimation and measurement by learning how to make pancakes. A hands-on lesson designed for students in grades 3-5 where young scholars are engage in hand-on experiences involving measuring volume,...
Lesson Plan
Alabama Learning Exchange

Alex: Guess My Shape

For Teachers K - 1st Standards
The students will make the connection between 2-D and 3-D shapes using modeling clay and geometric solids and participate in an interactive web instructional activity. Students will make predictions about what 2-D shape they think will...
Unit Plan
PBS

Pbs: Mike and Padhu: Bikes and Trikes

For Students 6th - 8th
Solve a word problem with Mike and Padhu. This video focuses on valid methods of problem solving, including guess-and-check and modeling with manipulatives.
Activity
Other

Resolucion De Ecuaciones

For Students 9th - 10th
In Spanish. An online step by step explanation of various problem solving methods of one variable equations. Includes eight practice equations for students, with solutions available.
Activity
University of Cambridge

University of Cambridge: Nrich: A Shapey Network

For Students Pre-K - 1st
Sharpen your problem solving and logic skills on this network activity. There is a "Printable Page," link if you want to print it out to help you with your strategy.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Absolute Value Equations

For Students 9th - 10th
Helpful resources for planning classroom instruction on absolute value equations: a lesson with example problems and step-by-step solutions; a practice exercise through which students can quiz their knowledge of absolute value equations...
Lesson Plan
Alabama Learning Exchange

Alex: Estimation Station

For Teachers 3rd - 5th Standards
During this instructional activity, students will learn the difference between estimation and guessing. Knowing how to estimate is an essential skill that will help students determine approximate totals as well as check the...